Hebrews 11:1 (NKJV): "Now faith is the substance of things hoped for, the evidence of things not seen."

In Matthew 15:21-28, we read about a Canaanite woman who desperately needed a miracle for her daughter. She knew Jesus had the power to help her. So she persistently cried out for Him to have mercy and deliver her demon possessed child. The Bible says Jesus pretty much ignored her until something remarkable happened. The Bible says, "Then came she and worshipped Him, saying, Lord, help me". There were so many of God's people with desperate needs, yet it took so much to convince them their God was walking among them, with the power to heal and help them. But here was a Canaanite woman who recognised Jesus for Who He was! This arrested His attention and provoked His response to move on her behalf. Her worship was a true act of faith. Even though she wasn't Jewish, and hadn't been taught and trained in the teachings of God's people, she recognised and worshipped Jesus, knowing full well He had the power to deliver her daughter. Our complaining doesn't move the hand of God, our worship does. So recognise Him for being exactly Who His Word says He is, and your faith will cause you to receive exactly what He has promised you.